Github user mengxr commented on a diff in the pull request: https://github.com/apache/spark/pull/16864#discussion_r100570007 --- Diff: common/sketch/src/main/java/org/apache/spark/util/sketch/BloomFilter.java --- @@ -81,6 +81,11 @@ int getVersionNumber() { public abstract long bitSize(); /** + * Swamidass & Baldi (2007) approximation for number of items in a Bloom filter + */ + public abstract double approxItems(); --- End diff -- It might be easier to keep it as double because the estimate could be out of bound if the bits are full.
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